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Hot Rods Can you successfully run a brake booster with a 671 blower

Discussion in 'The Hokey Ass Message Board' started by ratman, Oct 27, 2018.

  1. ratman
    Joined: Jun 15, 2006
    Posts: 423

    ratman
    Member

    I haven't been on the Hamb for a while. Life got busy and a job change dictated not a lot of spare time.
    I am currently thrashing on my current build and am undecided on whether or not to run a brake booster.
    My question is can you successfully run a brake booster with a blower. I do have a vacuum port at the base of the carb.
    Thanks in advance for your help.

    Peter 20180930_101931.jpg 20180826_151139.jpg 20180427_110529[1].jpg
     
    Deuces, mad mikey and chryslerfan55 like this.
  2. Only if you run a 'vacuum reservoir' would be my guess. You have basically two on a conventional application; the booster itself and the volume of the intake manifold plenum. You're lacking the latter one. Another choice may be an electric vacuum pump as used on a lot of diesels. I'm sure there's a way to do it, given factory supercharged cars, but it may take more paraphernalia than you have room for...
     
  3. Kerrynzl
    Joined: Jun 20, 2010
    Posts: 2,284

    Kerrynzl
    Member

    Seeing that you're in NZ, grab an alternator off a Jap Diesel with the vacuum pump on the back of it.
    They're good enough to haul-up a diesel truck. [and cheap and plentiful]
     
  4. ratman
    Joined: Jun 15, 2006
    Posts: 423

    ratman
    Member

    Thanks for the suggestion I will see what's out there and what size they are.

    Sent from my SM-G930F using The H.A.M.B. mobile app
     
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  5. ratman
    Joined: Jun 15, 2006
    Posts: 423

    ratman
    Member

    I had not thought of that. I had a quick look on Trade Me and found this. This could be a good solution thanks. 20181028_144558.jpeg

    Sent from my SM-G930F using The H.A.M.B. mobile app
     
  6. Slick set-up… You may want to check out how these were plumbed in an OEM application, you may still need a reservoir can.
     
  7. ratman
    Joined: Jun 15, 2006
    Posts: 423

    ratman
    Member

    I will put in a reservoir can. I can fabricate one up to suit available space.
    Thanks for the help.

    Sent from my SM-G930F using The H.A.M.B. mobile app
     
  8. Kerrynzl
    Joined: Jun 20, 2010
    Posts: 2,284

    Kerrynzl
    Member

    On a Mitsy Pajero, and Nissan Mistral the vacuum is plumbed direct to the booster.
    They have enough vacuum to "suck start a Harley"

    They need an oil feed and drain plumbed in [similar to turbos]
     
    gimpyshotrods and ratman like this.
  9. Kerrynzl
    Joined: Jun 20, 2010
    Posts: 2,284

    Kerrynzl
    Member

    That's what I'm thinking [the internal regulated Alts are easy to hook up]
    Go for a sunday shopping trip to "pick a part" with your phone camera. Some are LH and some RH
     
    gimpyshotrods and ratman like this.

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